Reddit – Dive into anything

I am still struggling after numerous attempts to convert a file without losing on quality. I don’t want add more quality, I just want to convert an MKV to MP4 without losing anything or adding to anything. I hope I made sense. Much obliged.

Update: Thanks for the suggestions guys, YES I am looking to play the MKV files on my PS4 and its unsupported so I must convert the media file, Its just that it takes ages and I don’t want to lose quality. Some mentioned FFMPEG, This was far too complicated for me. I have downloaded Media Xmedia Recode but it still manages to output a smaller sized media file, does this mean I have lost quality?